python-matplotlib-直方图绘制

例子：

计算组数

#计算组数
d=5 #组距
num_bins=(max(a)-min(a))//d

from matplotlib import pyplot as plt
from matplotlib import font_manager

#设置x，y轴数值
a=[131,98,125,131,124,139,131,117,128,108,135,138,131,102,107,114, 119,128,121,142,127,130,124,101,110.116,117,110,128,128,115,99,136,126,134,95,138,117,111,78,132,124,113,150,110,117,86,95,144,105, 126,130,126,130,126,116,123,106,112,138,123,86,101,99,136,123,17,119,105,137,123,128,125,104,109,34,125,127,105, 120, 107,129, 116,108,132,103, 136, 118,102,120,14,105,115,132,45,119,121.112,139,125,138,109,132,134,156,106,117,127, 144,139,139,19,140,83,110,102,123,107, 143, 115,136,118,139,123,112, 118, 125, 109,119,133,112,114,122,109,106,123,116, 131,127,115,118,112,135,115,146,137,116, 103,144,83,123,111, 110,11,100,154,136, 100,118, 119,133,134,106,129,126,110, 111,109,141,120,117,106,149,122,122, 110, 118, 127,121,114,125,126,114, 140, 103,130,141, 117, 106,14,121,114,133,137,92,121,112,146,97,137,105,98,117,112,81,97,139,113,134,106,144, 110,137,137, 111, 104, 117,100,11,101,110,105,129,137,112, 120,13,133,112,83,94,146,133,101,131,116.111,84,137,115,122,106,144,109,123,116,111,111,133,150]

#计算组数
d=5 #组距
num_bins=(max(a)-min(a))//d  #能被整除 组数

#设置图片大小
plt.figure(figsize=(18,8),dpi=80)

#绘制直方图
plt.hist(a,num_bins,density=True)#density为属性

#设置x轴刻度
plt.xticks(range(min(a),max(a)+d,d))

#绘制网格
plt.grid(alpha=0.5)

#展示
plt.show()